mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 00:49:43 +00:00
cd6cc3440f
CPUs arm946es and sa1100 both define the reset_cpu() function in their start.S file. Move this cpu-specific code into cpu.c so that start.S only contains ARM generic code. Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/*
|
|
* CPU specific code
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <asm/system.h>
|
|
#include <asm/io.h>
|
|
|
|
static void cache_flush(void);
|
|
|
|
int cleanup_before_linux (void)
|
|
{
|
|
/*
|
|
* this function is called just before we call linux
|
|
* it prepares the processor for linux
|
|
*
|
|
* we turn off caches etc ...
|
|
*/
|
|
|
|
disable_interrupts ();
|
|
|
|
/* ARM926E-S needs the protection unit enabled for the icache to have
|
|
* been enabled - left for possible later use
|
|
* should turn off the protection unit as well....
|
|
*/
|
|
/* turn off I/D-cache */
|
|
icache_disable();
|
|
dcache_disable();
|
|
/* flush I/D-cache */
|
|
cache_flush();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* flush I/D-cache */
|
|
static void cache_flush (void)
|
|
{
|
|
unsigned long i = 0;
|
|
|
|
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
|
|
asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
|
|
}
|
|
|
|
#ifndef CONFIG_INTEGRATOR
|
|
|
|
__attribute__((noreturn)) void reset_cpu(ulong addr __attribute__((unused)))
|
|
{
|
|
writew(0x0, 0xfffece10);
|
|
writew(0x8, 0xfffece10);
|
|
for (;;)
|
|
;
|
|
}
|
|
|
|
#endif /* #ifdef CONFIG_INTEGRATOR */
|